Jakob Rosanes (August 16, 1842 Brody, Austria-Hungary (now Ukraine) – January 6, 1922) was a German mathematician who worked on algebraic geometry and invariant theory. He was also a chess master.
Rosanes studied at University of Berlin and the University of Breslau. He obtained his doctorate from Breslau (Wrocław) in 1865 and taught there for the rest of his working life. He became professor in 1876 and rector of the university during the years 1903–1904.
Rosanes made significant contributions in Cremona transformations.
Notable chess games
* Jakob Rosanes vs Adolf Anderssen, Breslau 1862, Spanish Game: Berlin Defense. Rio Gambit Accepted (C67), 1-0 Sometimes, Rosanes was able to beat even one of the best masters of his time, Adolf Anderssen...
* O'Connor, John J.; Robertson, Edmund F., "Jakob Rosanes", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Rosanes.html .